/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.jobmanager.slots;

import org.apache.flink.runtime.jobmaster.LogicalSlot;
import org.apache.flink.runtime.jobmaster.SlotOwner;

import java.util.function.Consumer;

/** {@link SlotOwner} implementation for testing purposes. */
public class TestingSlotOwner implements SlotOwner {

    private volatile Consumer<LogicalSlot> returnAllocatedSlotConsumer;

    public void setReturnAllocatedSlotConsumer(Consumer<LogicalSlot> returnAllocatedSlotConsumer) {
        this.returnAllocatedSlotConsumer = returnAllocatedSlotConsumer;
    }

    @Override
    public void returnLogicalSlot(LogicalSlot logicalSlot) {
        final Consumer<LogicalSlot> currentReturnAllocatedSlotConsumer =
                returnAllocatedSlotConsumer;

        if (currentReturnAllocatedSlotConsumer != null) {
            currentReturnAllocatedSlotConsumer.accept(logicalSlot);
        }
    }
}
